A Swansea man has pleaded guilty to robbing five banks in Massachusetts and Rhode Island within a span of 26 days last spring.

Scott Niemic, 36, of Swansea, faces up to 100 years in federal prison and a $250,000 fine when he is sentenced Jan. 10, 2014, in U.S. District Court in Providence. He also could be placed on three years' supervised release.

Niemic pleaded guilty on Oct. 9 to committing five “note job” bank robberies between March 22 and April 16, 2012, authorities said.

Prosecutors said Niemic entered the banks wearing black wrap-around sunglasses and a baseball cap. He handed a note to tellers saying he was armed, demanded money and that no dye packs were to be included with the cash, police said. In some instances, prosecutors said Niemic verbally told bank employees he was armed.

In four robberies, authorities said Niemic kept a cellphone to his ear, purporting to be having a conversation with another person.

Authorities said Niemic admitted to robbing a total of $27,113 from two banks in Plymouth, as well as banks in Wellesley, Bellingham and Warwick, R.I.

The note left at the scene of the Warwick robbery, on April 3, 2012, was written on a piece of paper torn from a receipt for excise taxes paid for a motor vehicle registered in Old Town, Maine. The investigation determined the car was registered to Niemic’s mother and that the defendant, who was living in Swansea, had possession of the vehicle, authorities said.

Police executed a search warrant after locating the vehicle at Niemic’s Swansea residence on April 4, 2012. Among the items seized was a piece of paper that matched the torn paper handed to the bank employee the day before. Police said they learned that Niemic was also in possession of a second vehicle.

On April 23, 2012, an FBI agent who was a member of the law enforcement team investigating the bank robberies spotted Niemic operating a vehicle on Route 24, and contacted Massachusetts State Police for assistance. A state trooper attempted to stop the vehicle, but prosecutors said Niemic instead led police on a high-speed chase — exceeding 120 mph — on the streets of Fall River before crashing his vehicle.

Investigators said they recovered nearly $8,100 in cash from Niemic’s vehicle. The case is being prosecuted by Assistant U.S. Attorney Paul F. Daly Jr.

The case was investigated by the FBI, the police departments from Warwick, Plymouth, Bellingham, and Wellesley, along with the assistance of the Swansea and Westport police departments and the Massachusetts State Police.